NAME

SYNOPSIS

DESCRIPTION

udevd listens to kernel uevents. For every event, udevd executes
matching instructions specified in udev rules. See udev(7).
On startup the content of the directory /lib/udev/devices is copied to
/dev. If kernel modules specify static device nodes, these nodes are
created even without a corresponding kernel device, to allow on-demand
loading of kernel modules. Matching permissions specified in udev rules
are applied to these static device nodes.
The behavior of the running daemon can be changed with udevadmcontrol.

OPTIONS

--daemon
Detach and run in the background.
--debug
Print debug messages to stderr.
--children-max=
Limit the number of parallel executed events.
--exec-delay=
Number of seconds to delay the execution of RUN instructions. This
might be useful when debugging system crashes during coldplug cause
by loading non-working kernel modules.
--resolve-names=
Specify when udevd should resolve names of users and groups. When
set to early (the default) names will be resolved when the rules
are parsed. When set to late names will be resolved for every
event. When set to never names will never be resolved and all
devices will be owned by root.
--version
Print version number.
--help
Print help text.

ENVIRONMENT

UDEV_LOG=
Set the logging priority.

KERNELCOMMANDLINE

udev.log-priority=
Set the logging priority.
udev.children-max=
Limit the number of parallel executed events.
udev.exec-delay=
Number of seconds to delay the execution of RUN instructions. This
might be useful when debugging system crashes during coldplug cause
by loading non-working kernel modules.